TOILETS AND URINALS: Apply evenly under the toilet rim. Give up to 15 minutes contact time before brushing and finally flushing the toilet. HARD SURFACES: Dilute 1 part to 40 parts cold or hand hot water. Wash the surface with this solution. Rinse thoroughly with clean water. N.B. Do not use on acid sensitive surfaces such as marble, terrazzo, chrome or enamel. Do not leave neat material in prolonged contact; always rinse off.